New breast cancer cases in the U.S. are forecast to rise by as much as 50% by 2030, government researchers reported Monday.

But while the surge in cases will pose "a huge challenge" to medical providers over the coming decades, coauthor Philip S. Rosenberg, of the National Cancer Institute said, the data also revealed "one silver lining": lower incidence of the subtype known as estrogen-receptor-negative breast cancers, including difficult-to-treat HER2-positive and triple-negative types.

FOR THE RECORD

Breast cancer: An article in the April 26 Section A about a projected increase in breast cancer cases by 2030 suggested that invasive breast cancers are ones that have spread to other parts of the body. Invasive breast cancers remain in the breast but have spread beyond their tissue of origin. In addition, an earlier version of the article said that the age distribution of women with new breast cancers would change by 2010. The age distribution will change by 2030.